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Biomimetic Amorphous Titania Nanoparticles as Ultrasound Responding Agents to Improve Cavitation and ROS Production for Sonodynamic Therapy. APPLIED SCIENCES-BASEL 2020. [DOI: 10.3390/app10238479] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
Conventional therapies to treat cancer often exhibit low specificity, reducing the efficiency of the treatment and promoting strong side effects. To overcome these drawbacks, new ways to fight cancer cells have been developed so far focusing on nanosystems. Different action mechanisms to fight cancer cells have been explored using nanomaterials, being their remote activation one of the most promising. Photo- and sonodynamic therapies are relatively new approaches that emerged following this idea. These therapies are based on the ability of specific agents to generate highly cytotoxic reactive oxygen species (ROS) by external stimulation with light or ultrasounds (US), respectively. Crystalline (TiO2) and amorphous titania (a-TiO2) nanoparticles (NPs) present a set of very interesting characteristics, such as their photo-reactivity, photo stability, and effective bactericidal properties. Their production is inexpensive and easily scalable; they are reusable and demonstrated already to be nontoxic. Therefore, these NPs have been increasingly studied as promising photo- or sonosensitizers to be applied in photodynamic/sonodynamic therapies in the future. However, they suffer from poor colloidal stability in aqueous and biological relevant media. Therefore, various organic and polymer-based coatings have been proposed. In this work, the role of a-TiO2 based NPs synthesized through a novel, room-temperature, base-catalyzed, sol-gel protocol in the generation of ROS and as an enhancer of acoustic inertial cavitation was evaluated under ultrasound irradiation. A novel biomimetic coating based on double lipidic bilayer, self-assembled on the a-TiO2-propylamine NPs, is proposed to better stabilize them in water media. The obtained results show that the biomimetic a-TiO2-propylamine NPs are promising candidates to be US responding agents, since an improvement of the cavitation effect occurs in presence of the developed NPs. Further studies will show their efficacy against cancer cells.
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52
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Liu J, Liu J, Attarilar S, Wang C, Tamaddon M, Yang C, Xie K, Yao J, Wang L, Liu C, Tang Y. Nano-Modified Titanium Implant Materials: A Way Toward Improved Antibacterial Properties. Front Bioeng Biotechnol 2020; 8:576969. [PMID: 33330415 PMCID: PMC7719827 DOI: 10.3389/fbioe.2020.576969] [Citation(s) in RCA: 36] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2020] [Accepted: 10/22/2020] [Indexed: 01/01/2023] Open
Abstract
Titanium and its alloys have superb biocompatibility, low elastic modulus, and favorable corrosion resistance. These exceptional properties lead to its wide use as a medical implant material. Titanium itself does not have antibacterial properties, so bacteria can gather and adhere to its surface resulting in infection issues. The infection is among the main reasons for implant failure in orthopedic surgeries. Nano-modification, as one of the good options, has the potential to induce different degrees of antibacterial effect on the surface of implant materials. At the same time, the nano-modification procedure and the produced nanostructures should not adversely affect the osteogenic activity, and it should simultaneously lead to favorable antibacterial properties on the surface of the implant. This article scrutinizes and deals with the surface nano-modification of titanium implant materials from three aspects: nanostructures formation procedures, nanomaterials loading, and nano-morphology. In this regard, the research progress on the antibacterial properties of various surface nano-modification of titanium implant materials and the related procedures are introduced, and the new trends will be discussed in order to improve the related materials and methods.
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Affiliation(s)
- Jianqiao Liu
- Department of Orthopaedics, Affiliated Hospital of Youjiang Medical University for Nationalities, Baise, China
- Youjiang Medical University for Nationalities, Baise, China
| | - Jia Liu
- Department of Orthopaedics, Affiliated Hospital of Youjiang Medical University for Nationalities, Baise, China
| | - Shokouh Attarilar
- Department of Pediatric Orthopaedics, Xin Hua Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai, China
- State Key Laboratory of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai, China
| | - Chong Wang
- College of Mechanical Engineering, Dongguan University of Technology, Dongguan, China
| | - Maryam Tamaddon
- Institute of Orthopaedic and Musculoskeletal Science, Division of Surgery & Orthopaedic Science, University College London, The Royal National National Orthopaedic Hospital, Stanmore, United Kingdom
| | - Chengliang Yang
- Department of Orthopaedics, Affiliated Hospital of Youjiang Medical University for Nationalities, Baise, China
| | - Kegong Xie
- Department of Orthopaedics, Affiliated Hospital of Youjiang Medical University for Nationalities, Baise, China
| | - Jinguang Yao
- Youjiang Medical University for Nationalities, Baise, China
| | - Liqiang Wang
- State Key Laboratory of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai, China
| | - Chaozong Liu
- Institute of Orthopaedic and Musculoskeletal Science, Division of Surgery & Orthopaedic Science, University College London, The Royal National National Orthopaedic Hospital, Stanmore, United Kingdom
| | - Yujin Tang
- Department of Orthopaedics, Affiliated Hospital of Youjiang Medical University for Nationalities, Baise, China
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53
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Radiom M, Sarkis M, Brookes O, Oikonomou EK, Baeza-Squiban A, Berret JF. Pulmonary surfactant inhibition of nanoparticle uptake by alveolar epithelial cells. Sci Rep 2020; 10:19436. [PMID: 33173147 PMCID: PMC7655959 DOI: 10.1038/s41598-020-76332-7] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2020] [Accepted: 10/20/2020] [Indexed: 02/04/2023] Open
Abstract
Pulmonary surfactant forms a sub-micrometer thick fluid layer that covers the surface of alveolar lumen and inhaled nanoparticles therefore come in to contact with surfactant prior to any interaction with epithelial cells. We investigate the role of the surfactant as a protective physical barrier by modeling the interactions using silica-Curosurf-alveolar epithelial cell system in vitro. Electron microscopy displays that the vesicles are preserved in the presence of nanoparticles while nanoparticle-lipid interaction leads to formation of mixed aggregates. Fluorescence microscopy reveals that the surfactant decreases the uptake of nanoparticles by up to two orders of magnitude in two models of alveolar epithelial cells, A549 and NCI-H441, irrespective of immersed culture on glass or air-liquid interface culture on transwell. Confocal microscopy corroborates the results by showing nanoparticle-lipid colocalization interacting with the cells. Our work thus supports the idea that pulmonary surfactant plays a protective role against inhaled nanoparticles. The effect of surfactant should therefore be considered in predictive assessment of nanoparticle toxicity or drug nanocarrier uptake. Models based on the one presented in this work may be used for preclinical tests with engineered nanoparticles.
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Affiliation(s)
- M Radiom
- UMR CNRS 7057, Laboratoire Matière Et Systèmes Complexes, Université de Paris, Paris, France.
- Institute for Food, Nutrition and Health, D-HEST, ETH Zürich, Zürich, Switzerland.
| | - M Sarkis
- UMR CNRS 7057, Laboratoire Matière Et Systèmes Complexes, Université de Paris, Paris, France
| | - O Brookes
- UMR CNRS 8251, Unité de Biologie Fonctionnelle et Adaptative, Université de Paris, Paris, France
| | - E K Oikonomou
- UMR CNRS 7057, Laboratoire Matière Et Systèmes Complexes, Université de Paris, Paris, France
| | - A Baeza-Squiban
- UMR CNRS 8251, Unité de Biologie Fonctionnelle et Adaptative, Université de Paris, Paris, France
| | - J-F Berret
- UMR CNRS 7057, Laboratoire Matière Et Systèmes Complexes, Université de Paris, Paris, France.
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54
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Kapusuz D. Exploring the structure of sol-gel-derived hybrids for immobilization of RNA: Influence of RNA content. Colloid Polym Sci 2020. [DOI: 10.1007/s00396-020-04768-4] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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55
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Hafidh A, Touati F, Sediri F. Synthesis, charaterization and optical properties of nanostructured silica hybrid materials obtained by soft chemistry from perhydropolysilazane/1,2,4-triazole precursors. J Mol Struct 2020. [DOI: 10.1016/j.molstruc.2020.128496] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
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56
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Siciliano G, Corricelli M, Iacobazzi RM, Canepa F, Comegna D, Fanizza E, Del Gatto A, Saviano M, Laquintana V, Comparelli R, Mascolo G, Murgolo S, Striccoli M, Agostiano A, Denora N, Zaccaro L, Curri ML, Depalo N. Gold-Speckled SPION@SiO 2 Nanoparticles Decorated with Thiocarbohydrates for ASGPR1 Targeting: Towards HCC Dual Mode Imaging Potential Applications. Chemistry 2020; 26:11048-11059. [PMID: 32628283 DOI: 10.1002/chem.202002142] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2020] [Revised: 07/01/2020] [Indexed: 12/15/2022]
Abstract
Efforts are made to perform an early and accurate detection of hepatocellular carcinoma (HCC) by simultaneous exploiting multiple clinically non-invasive imaging modalities. Original nanostructures derived from the combination of different inorganic domains can be used as efficient contrast agents in multimodal imaging. Superparamagnetic iron oxide nanoparticles (SPIONs) and Au nanoparticles (NPs) possess well-established contrasting features in magnetic resonance imaging (MRI) and X-ray computed tomography (CT), respectively. HCC can be targeted by using specific carbohydrates able to recognize asialoglycoprotein receptor 1 (ASGPR1) overexpressed in hepatocytes. Here, two different thiocarbohydrate ligands were purposely designed and alternatively conjugated to the surface of Au-speckled silica-coated SPIONs NPs, to achieve two original nanostructures that could be potentially used for dual mode targeted imaging of HCC. The results indicated that the two thiocarbohydrate decorated nanostructures possess convenient plasmonic/superparamagnetic properties, well-controlled size and morphology and good selectivity for targeting ASGPR1 receptor.
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Affiliation(s)
- Giulia Siciliano
- Istituto per i Processi Chimico Fisici IPCF S.S: Bari, CNR, Dipartimento di Chimica, Università degli studi di Bari Aldo Moro, Via Orabona 4, 70124, Bari, Italy.,Dipartimento di Chimica, Università degli Studi di Bari Aldo Moro, Via Orabona 4, 70124, Bari, Italy.,Present address: Dipartimento di Matematica e Fisica "Ennio De Giorgi", Università del Salento, 73100, Lecce, Italy
| | - Michela Corricelli
- Istituto per i Processi Chimico Fisici IPCF S.S: Bari, CNR, Dipartimento di Chimica, Università degli studi di Bari Aldo Moro, Via Orabona 4, 70124, Bari, Italy
| | - Rosa Maria Iacobazzi
- Istituto Tumori Giovanni Paolo II, IRCCS, Viale Orazio Flacco 65, 70124, Bari, Italy
| | - Fabio Canepa
- Dipartimento di Chimica e Chimica Industriale-SPIN-CNR Unità di Genova, Università degli Studi di Genova, via Dodecaneso 31, 16146, Genova, Italy
| | - Daniela Comegna
- Istituto di Biostrutture e Bioimmagini IBB, CNR, Via Mezzocannone 16, 80134, Napoli, Italy
| | - Elisabetta Fanizza
- Istituto per i Processi Chimico Fisici IPCF S.S: Bari, CNR, Dipartimento di Chimica, Università degli studi di Bari Aldo Moro, Via Orabona 4, 70124, Bari, Italy.,Dipartimento di Chimica, Università degli Studi di Bari Aldo Moro, Via Orabona 4, 70124, Bari, Italy
| | - Annarita Del Gatto
- Istituto di Biostrutture e Bioimmagini IBB, CNR, Via Mezzocannone 16, 80134, Napoli, Italy
| | - Michele Saviano
- Istituto di Cristallografia IC, CNR, Via Giovanni Amendola, 122/O, 70126, Bari, Italy
| | - Valentino Laquintana
- Dipartimento di Farmacia-Scienze del Farmaco, Università degli Studi di Bari Aldo Moro, Via Orabona 4, 70124, Bari, Italy
| | - Roberto Comparelli
- Istituto per i Processi Chimico Fisici IPCF S.S: Bari, CNR, Dipartimento di Chimica, Università degli studi di Bari Aldo Moro, Via Orabona 4, 70124, Bari, Italy
| | - Giuseppe Mascolo
- Istituto di Ricerca Sulle Acque IRSA, CNR, Area della Ricerca Roma 1, Via Salaria Km 29,300 C.P. 10, 00015 Monterotondo Stazione, Roma, Italy
| | - Sapia Murgolo
- Istituto di Ricerca Sulle Acque IRSA, CNR, Viale Francesco de Blasio 5, 70132, Bari, Italy
| | - Marinella Striccoli
- Istituto per i Processi Chimico Fisici IPCF S.S: Bari, CNR, Dipartimento di Chimica, Università degli studi di Bari Aldo Moro, Via Orabona 4, 70124, Bari, Italy
| | - Angela Agostiano
- Istituto per i Processi Chimico Fisici IPCF S.S: Bari, CNR, Dipartimento di Chimica, Università degli studi di Bari Aldo Moro, Via Orabona 4, 70124, Bari, Italy.,Dipartimento di Chimica, Università degli Studi di Bari Aldo Moro, Via Orabona 4, 70124, Bari, Italy
| | - Nunzio Denora
- Istituto per i Processi Chimico Fisici IPCF S.S: Bari, CNR, Dipartimento di Chimica, Università degli studi di Bari Aldo Moro, Via Orabona 4, 70124, Bari, Italy.,Dipartimento di Farmacia-Scienze del Farmaco, Università degli Studi di Bari Aldo Moro, Via Orabona 4, 70124, Bari, Italy
| | - Laura Zaccaro
- Istituto di Biostrutture e Bioimmagini IBB, CNR, Via Mezzocannone 16, 80134, Napoli, Italy
| | - M Lucia Curri
- Istituto per i Processi Chimico Fisici IPCF S.S: Bari, CNR, Dipartimento di Chimica, Università degli studi di Bari Aldo Moro, Via Orabona 4, 70124, Bari, Italy.,Dipartimento di Chimica, Università degli Studi di Bari Aldo Moro, Via Orabona 4, 70124, Bari, Italy
| | - Nicoletta Depalo
- Istituto per i Processi Chimico Fisici IPCF S.S: Bari, CNR, Dipartimento di Chimica, Università degli studi di Bari Aldo Moro, Via Orabona 4, 70124, Bari, Italy
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57
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Poscher V, Salinas Y. Trends in Degradable Mesoporous Organosilica-Based Nanomaterials for Controlling Drug Delivery: A Mini Review. MATERIALS (BASEL, SWITZERLAND) 2020; 13:E3668. [PMID: 32825140 PMCID: PMC7504184 DOI: 10.3390/ma13173668] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/03/2020] [Revised: 08/14/2020] [Accepted: 08/17/2020] [Indexed: 12/27/2022]
Abstract
The last few years of enhancing the design of hybrid mesoporous organosilica nanoparticleshas allowed their degradation under specific pathologic conditions, which finally is showing a lightin their potential use as drug delivery systems towards clinical trials. Nevertheless, the issueof controlling the degradation on-demand at cellular level still remains a major challenge, even if ithas lately been addressed through the incorporation of degradable organo-bridged alkoxysilanesinto the silica framework. On this basis, this mini review covers some of the most recent examplesof dierent degradable organosilica nanomaterials with potential application in nanomedicine,from degradable non-porous to mesoporous organosilica nanoparticles (MONs), functionalized withresponsive molecular gates, and also the very promising degradable periodic mesoporous organosilicamaterials (PMOs) only consisting of organosilica bridges.
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Affiliation(s)
| | - Yolanda Salinas
- Institute of Polymer Chemistry (ICP) and Linz Institute of Technology (LIT), Johannes Kepler University Linz, Altenberger Straße 69, A-4040 Linz, Austria;
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58
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Svobodová J, Mikšík I. Open-tubular capillary electrochromatographic application of a sol-gel matrix with chilli peppers, garlic, or synthetic additives. J Sep Sci 2020; 43:3691-3701. [PMID: 32662597 DOI: 10.1002/jssc.202000515] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2020] [Revised: 07/09/2020] [Accepted: 07/09/2020] [Indexed: 11/07/2022]
Abstract
This article describes a possible combination of two promising fields of analytical chemistry-the preparation of sol-gel matrices with varying additives and their application in capillary electrochromatography. The inner surfaces of capillaries were coated with the sol-gel solution containing either pure synthetic chemical additive-alliin or capsaicin-or an extract of their natural sources-garlic and chilli pepper, respectively. The modified capillaries were tested for interaction with two neurotransmitters, oligopeptides and nucleotides under conditions of open-tubular capillary electrochromatography. Because both of the natural extracts also contain vitamin C and saccharose, the capillaries with sol-gel modifiers containing each of these substances were also tested. The obtained results from the perspective of changes in the electrochromatograms and the effective mobilities of analytes are discussed with respect to mild conditions both in the preparation process of the sol-gel matrix and during the separations.
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Affiliation(s)
- Jana Svobodová
- Department of Translation Metabolism, Institute of Physiology of the Czech Academy of Sciences, Prague, Czech Republic
| | - Ivan Mikšík
- Department of Translation Metabolism, Institute of Physiology of the Czech Academy of Sciences, Prague, Czech Republic
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59
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Huo SC, Yue B. Approaches to promoting bone marrow mesenchymal stem cell osteogenesis on orthopedic implant surface. World J Stem Cells 2020; 12:545-561. [PMID: 32843913 PMCID: PMC7415248 DOI: 10.4252/wjsc.v12.i7.545] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/28/2020] [Revised: 05/13/2020] [Accepted: 05/30/2020] [Indexed: 02/06/2023] Open
Abstract
Bone marrow-derived mesenchymal stem cells (BMSCs) play a critical role in the osseointegration of bone and orthopedic implant. However, osseointegration between the Ti-based implants and the surrounding bone tissue must be improved due to titanium’s inherent defects. Surface modification stands out as a versatile technique to create instructive biomaterials that can actively direct stem cell fate. Here, we summarize the current approaches to promoting BMSC osteogenesis on the surface of titanium and its alloys. We will highlight the utilization of the unique properties of titanium and its alloys in promoting tissue regeneration, and discuss recent advances in understanding their role in regenerative medicine. We aim to provide a systematic and comprehensive review of approaches to promoting BMSC osteogenesis on the orthopedic implant surface.
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Affiliation(s)
- Shi-Cheng Huo
- Department of Bone and Joint Surgery, Renji Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 200011, China
| | - Bing Yue
- Department of Bone and Joint Surgery, Renji Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 200011, China
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60
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Startek K, Marczak J, Lukowiak A. Oxygen barrier enhancement of polymeric foil by sol-gel-derived hybrid silica layers. POLYMER 2020. [DOI: 10.1016/j.polymer.2020.122437] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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61
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Sayehi M, Tounsi H, Garbarino G, Riani P, Busca G. Reutilization of silicon- and aluminum- containing wastes in the perspective of the preparation of SiO 2-Al 2O 3 based porous materials for adsorbents and catalysts. WASTE MANAGEMENT (NEW YORK, N.Y.) 2020; 103:146-158. [PMID: 31877498 DOI: 10.1016/j.wasman.2019.12.013] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/29/2019] [Revised: 11/08/2019] [Accepted: 12/08/2019] [Indexed: 06/10/2023]
Abstract
The waste materials available as sources of silicon and aluminum for producing porous materials like amorphous silicas, aluminas, amorphous silica-aluminas, and zeolites, to be used as catalyst and adsorbents, are briefly summarized. The procedures for preparing these materials from wastes are also taken into account. The limits of this approach in terms of economy and environmental protection are also briefly considered. It is concluded that mesoporous materials can be prepared from wastes, but care to product quality and to overall process efficiency is needed.
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Affiliation(s)
- Mouna Sayehi
- Laboratoire des Matériaux Avancés, Ecole Nationale d'Ingénieurs de Sfax, Université de Sfax, Tunisia
| | - Hassib Tounsi
- Laboratoire des Matériaux Avancés, Ecole Nationale d'Ingénieurs de Sfax, Université de Sfax, Tunisia
| | - Gabriella Garbarino
- Dipartimento di Ingegneria Civile, Chimica e Ambientale (DICCA), Università degli Studi di Genova, via Opera Pia 15, 16145 Genova, Italy; Consorzio INSTM, UdR di Genova, Via Dodecaneso 31, 16146 Genoa, Italy
| | - Paola Riani
- Consorzio INSTM, UdR di Genova, Via Dodecaneso 31, 16146 Genoa, Italy; Dipartimento di Farmacia (DIFAR), Università degli Studi di Genova, Viale Cembrano 4, 16148 Genova, Italy
| | - Guido Busca
- Dipartimento di Ingegneria Civile, Chimica e Ambientale (DICCA), Università degli Studi di Genova, via Opera Pia 15, 16145 Genova, Italy; Consorzio INSTM, UdR di Genova, Via Dodecaneso 31, 16146 Genoa, Italy.
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62
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Putz AM, Ianăși C, Dudás Z, Coricovac D, Watz C(F, Len A, Almásy L, Sacarescu L, Dehelean C. SiO 2-PVA-Fe(acac) 3 Hybrid Based Superparamagnetic Nanocomposites for Nanomedicine: Morpho-textural Evaluation and In Vitro Cytotoxicity Assay. Molecules 2020; 25:molecules25030653. [PMID: 32033018 PMCID: PMC7038086 DOI: 10.3390/molecules25030653] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2019] [Revised: 01/31/2020] [Accepted: 02/01/2020] [Indexed: 12/29/2022] Open
Abstract
A facile sol-gel route has been applied to synthesize hybrid silica-PVA-iron oxide nanocomposite materials. A step-by-step calcination (processing temperatures up to 400 °C) was applied in order to oxidize the organics together with the iron precursor. Transmission electron microscopy, X-ray diffraction, small angle neutron scattering, and nitrogen porosimetry were used to determine the temperature-induced morpho-textural modifications. In vitro cytotoxicity assay was conducted by monitoring the cell viability by the means of MTT assay to qualify the materials as MRI contrast agents or as drug carriers. Two cell lines were considered: the HaCaT (human keratinocyte cell line) and the A375 tumour cell line of human melanoma. Five concentrations of 10 µg/mL, 30 µg/mL, 50 µg/mL, 100 µg/mL, and 200 µg/mL were tested, while using DMSO (dimethylsulfoxid) and PBS (phosphate saline buffer) as solvents. The HaCaT and A375 cell lines were exposed to the prepared agent suspensions for 24 h. In the case of DMSO (dimethyl sulfoxide) suspensions, the effect on human keratinocytes migration and proliferation were also evaluated. The results indicate that only the concentrations of 100 μg/mL and 200 μg/mL of the nanocomposite in DMSO induced a slight decrease in the HaCaT cell viability. The PBS based in vitro assay showed that the nanocomposite did not present toxicity on the HaCaT cells, even at high doses (200 μg/mL agent).
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Affiliation(s)
- Ana-Maria Putz
- ”Coriolan Dragulescu” Institute of Chemistry, Romanian Academy, Mihai Viteazul Bd., No. 24, 300223 Timişoara, Romania; (A.-M.P.); (C.I.)
| | - Cătălin Ianăși
- ”Coriolan Dragulescu” Institute of Chemistry, Romanian Academy, Mihai Viteazul Bd., No. 24, 300223 Timişoara, Romania; (A.-M.P.); (C.I.)
| | - Zoltán Dudás
- Wigner Research Centre for Physics, POB 49 1525 Budapest, Hungary
- Correspondence:
| | - Dorina Coricovac
- Pharmacy II Department, Faculty of Pharmacy, “Victor Babes ¸” University of Medicine and Pharmacy, 2 Eftimie Murgu Sq., 300041 Timisoara, Romania; (D.C.)
| | - Claudia (Farcas) Watz
- Pharmacy II Department, Faculty of Pharmacy, “Victor Babes ¸” University of Medicine and Pharmacy, 2 Eftimie Murgu Sq., 300041 Timisoara, Romania; (D.C.)
| | - Adél Len
- Centre for Energy Research, Konkoly-Thege 29-33, 1121 Budapest, Hungary;
- University of Pécs, Faculty of Engineering and Information technology, Boszorkány St. 2, 7624 Pécs, Hungary
| | - László Almásy
- Wigner Research Centre for Physics, POB 49 1525 Budapest, Hungary
| | - Liviu Sacarescu
- Institute of Macromolecular Chemistry “Petru Poni”, Aleea Grigore Ghica Voda, nr. 41A 700487 Iasi, Romania;
| | - Cristina Dehelean
- Pharmacy II Department, Faculty of Pharmacy, “Victor Babes ¸” University of Medicine and Pharmacy, 2 Eftimie Murgu Sq., 300041 Timisoara, Romania; (D.C.)
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Machado D, Almeida D, Seabra CL, Andrade JC, Gomes AM, Freitas AC. Nanoprobiotics: When Technology Meets Gut Health. FUNCTIONAL BIONANOMATERIALS 2020. [DOI: 10.1007/978-3-030-41464-1_17] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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64
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More than a Confinement: “Soft” and “Hard” Enzyme Entrapment Modulates Biological Catalyst Function. Catalysts 2019. [DOI: 10.3390/catal9121024] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
Catalysis makes chemical and biochemical reactions kinetically accessible. From a technological point of view, organic, inorganic, and biochemical catalysis is relevant for several applications, from industrial synthesis to biomedical, material, and food sciences. A heterogeneous catalyst, i.e., a catalyst confined in a different phase with respect to the reagents’ phase, requires either its physical confinement in an immobilization matrix or its physical adsorption on a surface. In this review, we will focus on the immobilization of biological catalysts, i.e., enzymes, by comparing hard and soft immobilization matrices and their effect on the modulation of the catalysts’ function. Indeed, unlike smaller molecules, the catalytic activity of protein catalysts depends on their structure, conformation, local environment, and dynamics, properties that can be strongly affected by the immobilization matrices, which, therefore, not only provide physical confinement, but also modulate catalysis.
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65
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Tuning the properties of hybrid SiO2/ poly(glycerol monomethacrylate) nanoparticles for enzyme nanoencapsulation. Colloids Surf A Physicochem Eng Asp 2019. [DOI: 10.1016/j.colsurfa.2019.123734] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
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Jiang W, Fang H, Liu F, Zhou X, Zhao H, He X, Guo D. PEG-coated and Gd-loaded fluorescent silica nanoparticles for targeted prostate cancer magnetic resonance imaging and fluorescence imaging. Int J Nanomedicine 2019; 14:5611-5622. [PMID: 31413566 PMCID: PMC6662520 DOI: 10.2147/ijn.s207098] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2019] [Accepted: 06/17/2019] [Indexed: 01/01/2023] Open
Abstract
Background: Multimodal imaging probes have become a powerful tool for improving detection sensitivity and accuracy, which are important in disease diagnosis and treatment. Methods: In this study, novel bifunctional magnetic resonance imaging (MRI)/fluorescence probes were prepared by loading gadodiamide into fluorescent silica nanoparticles (NPs) (Gd@Cy5.5@SiO2-PEG-Ab NPs) for targeting of prostate cancer (PCa). The physicochemical characteristics, biosafety and PCa cell targeting ability of the Gd@Cy5.5@SiO2-PEG-Ab NPs were studied in vitro and in vivo. Results: The Gd@Cy5.5@SiO2-PEG-Ab NPs had a spherical morphology with a relatively uniform size distribution and demonstrated high efficiency for Gd loading. In vitro and in vivo cell-targeting experiments demonstrated a high potential for the synthesized NPs to target prostate-specific membrane antigen (PSMA) receptor-positive PCa cells, enabling MRI and fluorescence imaging. In vitro cytotoxicity assays and in vivo hematological and pathological assays showed that the prepared NPs exhibited good biological safety. Conclusion: Our study demonstrates that the synthesized Gd@Cy5.5@SiO2-PEG-Ab NPs have great potential as MRI/fluorescence contrast agents for specific identification of PSMA receptor-positive PCa cells.
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Affiliation(s)
- Wei Jiang
- Department of Radiology, The Second Affiliated Hospital of Chongqing Medical University, Chongqing 400010, People's Republic of China
| | - Huiying Fang
- Department of Breast Diseases, Chongqing University Cancer Hospital, Chongqing Cancer Institute and Chongqing Cancer Hospital, Chongqing 400030, People's Republic of China
| | - Fengqiu Liu
- Institute of Ultrasound Imaging, Department of Ultrasound, The Second Affiliated Hospital of Chongqing Medical University, Chongqing 400010, People's Republic of China
| | - Xue Zhou
- Department of Radiology, The Second Affiliated Hospital of Chongqing Medical University, Chongqing 400010, People's Republic of China
| | - Hongyun Zhao
- Department of Gastroenterology, The Second Affiliated Hospital of Chongqing Medical University, Chongqing 400010, People's Republic of China
| | - Xiaojing He
- Department of Radiology, The Second Affiliated Hospital of Chongqing Medical University, Chongqing 400010, People's Republic of China
| | - Dajing Guo
- Department of Radiology, The Second Affiliated Hospital of Chongqing Medical University, Chongqing 400010, People's Republic of China
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SPIONs Prepared in Air through Improved Synthesis Methodology: The Influence of γ-Fe 2O 3/Fe 3O 4 Ratio and Coating Composition on Magnetic Properties. NANOMATERIALS 2019; 9:nano9070943. [PMID: 31261832 PMCID: PMC6669523 DOI: 10.3390/nano9070943] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/10/2019] [Revised: 06/18/2019] [Accepted: 06/24/2019] [Indexed: 01/19/2023]
Abstract
Superparamagnetic iron oxide nanoparticles (SPIONs) have shown great potential in biomedicine due to their high intrinsic magnetization behaviour. These are small particles of magnetite or maghemite, and when coated, their surface oxidation is prevented, their aggregation tendency is reduced, their dispersity is improved, and the stability and blood circulation time are increased, which are mandatory requirements in biomedical applications. In this work, SPIONs were synthesized in air through a reduction-precipitation method and coated with four different polymers (Polyethylene glycol(PEG) 1000/6000 and dextran T10/T70). All the synthesized samples were structurally and magnetically characterized by transmission electron microscopy, Fourier transform infra-red spectroscopy, X-ray powder diffraction, Mössbauer spectroscopy, and Superconducting Quantum Interference Device (SQUID) magnetometry. SPIONs centrifuged and dried in vacuum with an average diameter of at least 7.5 nm and a composition ≤60% of maghemite and ≥40% of magnetite showed the best magnetization results, namely a saturation magnetization of ~64 emu/g at 300 K, similar to the best reported values for SPIONs prepared in controlled atmosphere. As far as SPIONs’ coatings are concerned, during their preparation procedure, surface polymers must be introduced after the SPIONs’ precipitation. Furthermore, polymers with shorter chains do not affect the SPIONs’ magnetization performance, although longer chain polymers significantly decrease the coated particle magnetization values, which is undesirable.
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Matos JC, Oliveira C, Gonçalves MC. Daylight Bactericidal Titania Textiles: A Contribution to Nosocomial Infections Control. Molecules 2019; 24:E1891. [PMID: 31100977 PMCID: PMC6572034 DOI: 10.3390/molecules24101891] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2019] [Revised: 05/13/2019] [Accepted: 05/13/2019] [Indexed: 11/27/2022] Open
Abstract
: Daylight bactericidal cotton (100% cotton) textiles are presented and proposed for future hospital use. Amorphous titania (a-TiO2) and amorphous titania/chitosan complexes (a-TiO2//CS) were the selected bactericidal agents. Nanoparticles (NPs) and films were the two paths designed. Cotton textiles were impregnated with a-TiO2-based NPs or coated with a-TiO2 films. Industrial impregnation/coating will be implemented during the textile finishing treatments. A novel (room temperature and base-catalyzed), green (hydrothermal water as a catalyst), time-saving, and easy scale-up sol-gel process was established to produce the a-TiO2-based NPs. Amorphous-TiO2 films were produced by a dip-in (acid catalyzed) sol-gel solution. The daylight bactericidal performance (without the need of an external ultraviolet light source) of a-TiO2 NPs, films, and impregnated/coated textiles was proven according to AATCC 100 and ASTM E2149, using Staphylococcus aureus (ATCC®6538TM) as the bacterial indicator strain. A bacterial reduction of 99.97% was achieved for the a-TiO2 films and of 99.97% for the a-TiO2/CS NPs. Regarding the impregnated textiles, a bacterial reduction of 91.66% was achieved with a-TiO2/CS NPs, and 99.97% for cotton textiles coated with an a-TiO2 film.
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Affiliation(s)
- Joana C Matos
- Departamento de Engenharia Química, Instituto Superior Técnico, Universidade de Lisboa, 1049-001 Lisboa, Portugal.
- CQE, Centro de Química Estrutural, Instituto Superior Técnico, Universidade de Lisboa, 1049-001 Lisboa, Portugal.
| | - Cláudia Oliveira
- Departamento de Biologia, CESAM, Universidade de Aveiro, Campus Universitário de Santiago, 3810-193 Aveiro, Portugal.
| | - M Clara Gonçalves
- Departamento de Engenharia Química, Instituto Superior Técnico, Universidade de Lisboa, 1049-001 Lisboa, Portugal.
- CQE, Centro de Química Estrutural, Instituto Superior Técnico, Universidade de Lisboa, 1049-001 Lisboa, Portugal.
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Götz W, Tobiasch E, Witzleben S, Schulze M. Effects of Silicon Compounds on Biomineralization, Osteogenesis, and Hard Tissue Formation. Pharmaceutics 2019; 11:E117. [PMID: 30871062 PMCID: PMC6471146 DOI: 10.3390/pharmaceutics11030117] [Citation(s) in RCA: 78] [Impact Index Per Article: 15.6] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2019] [Revised: 02/25/2019] [Accepted: 03/03/2019] [Indexed: 12/19/2022] Open
Abstract
Bioinspired stem cell-based hard tissue engineering includes numerous aspects: The synthesis and fabrication of appropriate scaffold materials, their analytical characterization, and guided osteogenesis using the sustained release of osteoinducing and/or osteoconducting drugs for mesenchymal stem cell differentiation, growth, and proliferation. Here, the effect of silicon- and silicate-containing materials on osteogenesis at the molecular level has been a particular focus within the last decade. This review summarizes recently published scientific results, including material developments and analysis, with a special focus on silicon hybrid bone composites. First, the sources, bioavailability, and functions of silicon on various tissues are discussed. The second focus is on the effects of calcium-silicate biomineralization and corresponding analytical methods in investigating osteogenesis and bone formation. Finally, recent developments in the manufacturing of Si-containing scaffolds are discussed, including in vitro and in vivo studies, as well as recently filed patents that focus on the influence of silicon on hard tissue formation.
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Affiliation(s)
- Werner Götz
- Department of Orthodontics, Oral Biology Laboratory, School of Dentistry, Rheinische Wilhelms University of Bonn, Welschnonnenstr. 17, D-53111 Bonn, Germany.
| | - Edda Tobiasch
- Department of Natural Sciences, Bonn-Rhine-Sieg University of Applied Sciences, D-53359 Rheinbach, Germany.
| | - Steffen Witzleben
- Department of Natural Sciences, Bonn-Rhine-Sieg University of Applied Sciences, D-53359 Rheinbach, Germany.
| | - Margit Schulze
- Department of Natural Sciences, Bonn-Rhine-Sieg University of Applied Sciences, D-53359 Rheinbach, Germany.
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Ruiz-Clavijo A, Hurt AP, Kotha AK, Coleman NJ. Effect of Calcium Precursor on the Bioactivity and Biocompatibility of Sol-Gel-Derived Glasses. J Funct Biomater 2019; 10:E13. [PMID: 30813437 PMCID: PMC6463028 DOI: 10.3390/jfb10010013] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2019] [Revised: 02/14/2019] [Accepted: 02/20/2019] [Indexed: 01/28/2023] Open
Abstract
This study investigated the impact of different calcium reagents on the morphology, composition, bioactivity and biocompatibility of two-component (CaO-SiO₂) glasses produced by the Stöber process with respect to their potential application in guided tissue regeneration (GTR) membranes for periodontal repair. The properties of the binary glasses were compared with those of pure silica Stöber particles. The direct addition of calcium chloride (CC), calcium nitrate (CN), calcium methoxide (CM) or calcium ethoxide (CE) at 5 mol % with respect to tetraethyl orthosilicate in the reagent mixture gave rise to textured, micron-sized aggregates rather than monodispersed ~500 nm spheres obtained from the pure silica Stöber synthesis. The broadening of the Si-O-Si band at ~1100 cm-1 in the infrared spectra of the calcium-doped glasses indicated that the silicate network was depolymerised by the incorporation of Ca2+ ions and energy dispersive X-ray analysis revealed that, in all cases, the Ca:Si ratios were significantly lower than the nominal value of 0.05. The distribution of Ca2+ ions was also found to be highly inhomogeneous in the methoxide-derived glass. All samples released soluble silica species on exposure to simulated body fluid, although only calcium-doped glasses exhibited in vitro bioactivity via the formation of hydroxyapatite. The biocompatibilities of model chitosan-glass GTR membranes were assessed using human MG63 osteosarcoma cells and were found to be of the order: CN < pure silica ≈ CC << CM ≈ CE. Calcium nitrate is the most commonly reported precursor for the sol-gel synthesis of bioactive glasses; however, the incomplete removal of nitrate ions during washing compromised the cytocompatibility of the resulting glass. The superior bioactivity and biocompatibility of the alkoxide-derived glasses is attributed to their ease of dissolution and lack of residual toxic anions. Overall, calcium ethoxide was found to be the preferred precursor with respect to extent of calcium-incorporation, homogeneity, bioactivity and biocompatibility.
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Affiliation(s)
- Alejandra Ruiz-Clavijo
- Facultad de Ciencias Químicas, Universidad Complutense de Madrid, Av. Complutense, 28040 Madrid, Spain.
- Faculty of Engineering and Science, University of Greenwich, Chatham Maritime, Kent ME4 4TB, UK.
| | - Andrew P Hurt
- Faculty of Engineering and Science, University of Greenwich, Chatham Maritime, Kent ME4 4TB, UK.
| | - Arun K Kotha
- Faculty of Engineering and Science, University of Greenwich, Chatham Maritime, Kent ME4 4TB, UK.
| | - Nichola J Coleman
- Faculty of Engineering and Science, University of Greenwich, Chatham Maritime, Kent ME4 4TB, UK.
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